preloading

How do I preload images into dropzone.js

由 邮差的信 提交于 2019-11-28 16:28:54
问题 I have a dropzone.js instance on a web page with the following options: autoProcessQueue:false uploadMultiple:true parallelUploads:20 maxFiles:20 It is programmatically instantiated, as it is part of a larger form. I have it rigged up to process the queue when the form is submitted. The goal is for my users to be able to use the dropzone to manage images for an item, so when I load my 'edit/update' view for an item, I'd like to preload the dropzone with the images that had previously been

Custom Preloader in Flex 4?

由 断了今生、忘了曾经 提交于 2019-11-28 07:53:45
Has anyone successfully implemented a custom preloader in Flex 4? In my experience, when I specify a custom preloader using the preloader="com.foo.MyPreloader" in the Application tag, the preloader does not display until the SWF is completely downloaded, defeating the purpose of the preloader! Perhaps this is a bug in the still-beta Flex 4 framework? Simon Lenoir I've been using this example in many Flex3 projects. It's still working with Flex4 sdk: I can remember where I get it from. And you are right when you say it's important that this script is NOT referencing anything... <s:Application

Preload has_many associations with dynamic conditions

由 ε祈祈猫儿з 提交于 2019-11-27 15:06:16
问题 I have a Place model and an Event model. Places can have events that take place on a specific date . How can I set up my associations and finders to load all places including (eager loading) their events at a specific date without N+1 query problem? What I've tried: class Place has_many :events end Place.all.preload(:events).where("events.start_date > '#{time_in_the_future}'") #ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR: missing FROM-clause entry for table "events". Place.all

Custom Preloader in Flex 4?

由 雨燕双飞 提交于 2019-11-27 02:01:12
问题 Has anyone successfully implemented a custom preloader in Flex 4? In my experience, when I specify a custom preloader using the preloader="com.foo.MyPreloader" in the Application tag, the preloader does not display until the SWF is completely downloaded, defeating the purpose of the preloader! Perhaps this is a bug in the still-beta Flex 4 framework? 回答1: I've been using this example in many Flex3 projects. It's still working with Flex4 sdk: I can remember where I get it from. And you are

How to set the thumbnail image on HTML5 video?

由 爷，独闯天下 提交于 2019-11-26 12:06:10
问题 Is there a way to set thumbnail image on HTML5 video? I want to see some pictures before play. My code looks like this: <video width=\"470\" height=\"255\" controls> <source src=\"video.mp4\" type=\"video/mp4\"> <source src=\"video.ogg\" type=\"video/ogg\"> <source src=\"video.webm\" type=\"video/webm\"> <object data=\"video.mp4\" width=\"470\" height=\"255\"> <embed src=\"video.swf\" width=\"470\" height=\"255\"> </object> </video> Thanks! 回答1: Add poster="placeholder.png" to the video tag.

How do image preloaders work?

由 假如想象 提交于 2019-11-26 08:57:03
问题 I have a hard time getting my head around how image preloaders work in java-script. So if someone could could explain how they work with an example that would help a lot. no jquery 回答1: Loading a single image The browser will load images asynchronously...meaning when the browser is given the .src of an image, it will start loading that image in the background, but will also continue processing the javascript code directly after .src // create a new image object var img=new Image(); // set the

Image preloader javascript that supports events

由 穿精又带淫゛_ 提交于 2019-11-26 01:02:01
问题 I am trying to find an image preloader script. While i found a few, none of them supports an event that is triggered when preloading is finished. Does anyone know of any script or jQuery plugin that will do this? Hope this question is appropriate for stackoverflow - if not, feel free to remove it in an instant. 回答1: Here's a function that will preload images from an array and call your callback when the last one has finished: function preloadImages(srcs, imgs, callback) { var img; var

Image preloader javascript that supports events

由 人盡茶涼 提交于 2019-11-25 22:46:45
I am trying to find an image preloader script. While i found a few, none of them supports an event that is triggered when preloading is finished. Does anyone know of any script or jQuery plugin that will do this? Hope this question is appropriate for stackoverflow - if not, feel free to remove it in an instant. Here's a function that will preload images from an array and call your callback when the last one has finished: function preloadImages(srcs, imgs, callback) { var img; var remaining = srcs.length; for (var i = 0; i < srcs.length; i++) { img = new Image(); img.onload = function() { -
订阅 preloading